email verification

[ahazin]

I have created a form which allows the user to input name, email address and a message this is then sent to a php page which sends the information on to my email address. This is all working fine, but when i tried to add email validation it didnt seem to work for me.  I simply wanted to ensure the user had input the @ symbol, nothing more difficult than that.  Though if it was easy to implement more/better validation that would be a bonus. 

 

this is my code so far: 

 

*Note* i have 2 txt boxs called name_field and email_field  and a text area called message.

<?php 
$to = "[email protected]";
$subject = "Contact Us";
$name_field = $_REQUEST['name_field'] ;
$email_field = $_REQUEST['email_field'] ;
$message = $_REQUEST['message'] ;
$headers = "From: $email_field";
$body = "Name: $name_field \n E-Mail: $email_field \n Message:\n $message";
$sent = mail($to, $subject, $body, $headers) ;
if($sent)
{print ("<br><br><br><br><p align=\"center\"><strong><font face=\"Verdana, Arial, Helvetica, sans-serif\" font color = \"#FFFFFF\">Your message was sent successfully</strong></font>"); }
else
{print ("<br><br><br><br><p align=\"center\"><strong><font face=\"Verdana, Arial, Helvetica, sans-serif\" font color = \"#FFFFFF\">We encountered an error sending your message.  Please try again or call us on 07802 414985</strong></font>"); }
?>

 

When inputting the validation in i input this code:

function checkEmail($email_field) 
{
   if(eregi("^[a-zA-Z0-9_]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-\.]+$]", $email_field)) 
   {
      return FALSE;
   }
  else 
      {
         return TRUE; 
      }

if(checkEmail(email_field) == FALSE) 
{
   echo "E-mail entered is not valid.";
} 
else 
{
   echo "E-mail entered is valid.";
}

 

When this code is input it always says the email address is not valid wether it contains an @ symbol or not.

 

Does anyone know where i could be going wrong. 

 

Would really appreciate help on this.

 

Another thing i tried to get working was this, though im not so fussed on getting this section to work though it would be a bonus:

if ($name=="" or $message=="" or $email=="") {
echo "Please fill up all fields !";

 

The above also didnt work.

 

Any help would be greatly appreciated.

[ahazin]

so my full code is:

 

<?php 
function checkEmail($email_field) 
{
   if(eregi("^[a-zA-Z0-9_]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-\.]+$]", $email_field)) 
   {
      return FALSE;
   }
  else 
      {
         return TRUE; 
      }
}

$to = "[email protected]";
$subject = "Contact Us";
$name_field = $_REQUEST['name_field'] ;
$email_field = $_REQUEST['email_field'] ;
$message = $_REQUEST['message'] ;
if(checkEmail(email_field) == FALSE) 
{
   echo "E-mail entered is not valid.";
} 
else 
{
   echo "E-mail entered is valid.";
}

$headers = "From: $email_field";
$body = "Name: $name_field \n E-Mail: $email_field \n Message:\n $message";
$sent = mail($to, $subject, $body, $headers) ;
if($sent)
{print ("<br><br><br><br><p align=\"center\"><strong><font face=\"Verdana, Arial, Helvetica, sans-serif\" font color = \"#FFFFFF\">Your message was sent successfully</strong></font>"); }
else
{print ("<br><br><br><br><p align=\"center\"><strong><font face=\"Verdana, Arial, Helvetica, sans-serif\" font color = \"#FFFFFF\">We encountered an error sending your message.  Please try again or call us on 07802 414985</strong></font>"); }
?>

 

and for some reason no matter what i input as an email address it always says it is valid.

 

 

[ahazin]

ahh finally after much time and effort i got the email bit working